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By A. S. Troshin

Foreign sequence of Monographs in natural and utilized Biology: Zoology department, quantity 34:The mobile and Environmental Temperature records the court cases of the foreign Symposium on Cytoecology held in Leningrad, U.S.S.R., from could 31 to June five, 1965.

This compilation specializes in the position of mobile reactions within the version of multicellular organisms to environmental temperatures. the subjects comprise the biochemical and physiological features of plant frost-resistance; mechanisms of resistance of poikilothermic animals to subfreezing temperatures; and adjustments in carbohydrate content material of vegetation below heat-hardening. The research of seasonal adjustments in thermostability of frog muscular tissues; impression of temperature on breathing and oxidative phosphorylation of pea seedlings; and metabolic and vital anxious acclimation of fish to chilly also are covered.

This e-book is meant for biologists desirous about the cytology, body structure, and ecology of vegetation and animals.

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The Cell and Environmental Temperature. Proceedings of the International Symposium on Cytoecology

Overseas sequence of Monographs in natural and utilized Biology: Zoology department, quantity 34:The phone and Environmental Temperature records the complaints of the overseas Symposium on Cytoecology held in Leningrad, U. S. S. R. , from may perhaps 31 to June five, 1965. This compilation makes a speciality of the function of mobile reactions within the model of multicellular organisms to environmental temperatures.

Additional resources for The Cell and Environmental Temperature. Proceedings of the International Symposium on Cytoecology

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It had still to be shown that destruction of oxidative phosphorylation, which has been observed in vitro in chloroplasts and mitochondria, also occurred during the freezing of intact cells. > so f 60 j? y <5> 40 f -CZ Ci. "0 χ ι 20 & I 0 - c ï 0 I I 1 2 ι 3 I 4 Sucrose % FIG. 2 . Protective effect of sucrose on uncoupling of photophosphorylation by freezing, χ cyclic photophosphorylation; Ο non-cyclic photophosphorylation. Experimental conditions as outlined in Table 1 except that broken chloroplasts were frozen in solutions containing various amounts of sucrose.

1938) Biochem. J. 32, 286. F I S K E , C . H . and SUBBAROW, Y. (1929) J. Bio/. Chem. 8 1 , 629. G Ö R K E , H . (1906) Landrvirtsch. -Stat. 65, 149. HEBER, U. (1957) Ber. deut. botan. Ges. 70, 371HEBER, U. (1959) Protoplasma 51, 284. ÏLJIN, W . S. (1933) Protoplasma 20, 105. LEVITT, J . (1956) The Hardiness of Plants, New York. LEVITT, J . (1962) / . Theoret. Biol. 3, 335. LOVELOCK, J . Ε . (1957) Froc. Roy. Soc. London Β. 1 4 7 , 427. PORTER, V . , DENNING, N. , WRIGHT, R . C. and SCOTTS, E .

The experiment described made use of the sections taken from well-hardened plants (growing at -f 2°C) and slightly hardened ones (growing at +10 to +15°Q. To save space we will not describe the results of this experiment in detail, but have summarized them in Table 1. This lists the values which cause 20 and 70 per cent killing of cells. These values give the At° of the solutions used during drying {Af^ or for plasmolysis (Zl/° 2), or the actual freezing temperatures (/°). When t° = At°1 = At°2 the sections were affected by equal forces of dehydration and consequently cells were losing the same amounts of water.

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